Hi,

nixpkgs.lib.mkShell has the ability to get all inputs from a list of derivations. This is useful to not require respecification of dependencies.

I tried adapting the code from nixpkgs.lib.mkShell and got this function:

inputs-from = inputsFrom: builtins.concatMap (inputKind: (pkgs.lib.subtractLists inputsFrom (pkgs.lib.flatten (pkgs.lib.catAttrs inputKind inputsFrom)))) ["buildInputs" "nativeBuildInputs" "propagatedBuildInputs" "propagatedNativeBuildInputs"];

However it still does not work properly, so I'm putting this here in the hope that

• devenv gains this functionality by default (either by exposing a function or directly as an option for shells)
• someone notices what I did wrong

For more details on the error I am seeing:
I have a flake using flake.parts with this devenv section:

devenv.shells.default = {
          packages =
            [
               # rust toolchain and some other tools
            ]   
            ++ inputs-from (builtins.attrValues self'.checks);
        };

Which results in linker errors that cc is not found, so I'm assuming the function I wrote is faulty.
The Original version using nixpkgs.lib.mkShell worked fine:

devShells.default = pkgs.mkShell {
          inputsFrom = builtins.attrValues self'.checks;

          nativeBuildInputs =
            [
               # rust toolchain and some other tools
            ];    
        };